Thermal Analysis of a H1616 Shipping Container - prod.sandia.gov ...

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25 Flange Temperatures for Simulated Thermal Tests (C9SIM vs. CTSIM3). . . 33 26 Temperature Differences for Simulated Thermal Tests (C9SIM vs. CTSIM3). 34 27 Temperature Histories for Simulated Thermal Tests (C9SIM vs. ISSIM1). . . 35 28 Flange Temperatures for Simulated Thermal Tests (C9SIM vs. ISSIM1). . . . 36 29 Temperature Differences for Simulated Thermal Tests (C9SIM vs. ISSIM1). . 36 30 Temperature Histories for Simulated Thermal Tests (C9SIM vs. ISSIM2). . . 37 31 Flange Temperatures for Simulated Thermal Tests (C9SIM vs. ISSIM2). . . . 38 32 Temperature Differences for Simulated Thermal Tests (C9SIM vs. ISSIM2). . 38 33 Temperature Histories for Simulated Thermal Tests (C9SIM vs. ISSIM3). . . 40 34 Flange Temperatures for Simulated Thermal Tests (C9SIM vs. ISSIM3). . . . 40 35 Temperature Differences for Simulated Thermal Tests (C9SIM vs. ISSIM3). . 41 Tables 1 Layer Characteristics of the Shipping Container. . . . . . . . . . . . . . . . . . . . . . . . 8 2 Selected Properties of Materials within the Shipping Container. . . . . . . . . . . . 10 3 Thermal Properties of the Polyurethane Foam. . . . . . . . . . . . . . . . . . . . . . . . . . 10 4 Thermal Properties of the Packing Material. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5 Thermal Properties of the Thermal Barrier. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6 Thermal Properties of 304 Stainless Steel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7 Final Model Parameters determined through Calibration. . . . . . . . . . . . . . . . . 19 8 System Properties Predicted from Thermal Calibration Tests. . . . . . . . . . . . . 19 9 Description and Results of the C9 Simulation Scenarios. . . . . . . . . . . . . . . . . . 39 6
Thermal Analysis of a H1616 Shipping Container in Hypothetical Accident Conditions 1 Introduction During the spring of 2001, personnel from organization 8243 were finalizing the Safety Analysis Report for Packaging (SARP) for the H1616 shipping container when it was observed that the hypothetical accident condition (HAC) scenario as defined in the Federal requirements document [2] had not been tested for correctly. The requirements call for the container to be placed in a high temperature environment where the temperature exceeds 1475 ◦ F, such as in a pool fire or heat radiation facility, for thirty minutes. The requirements then specify that the container should be placed in an ambient temperature of 100 ◦ F and exposed to twelve hours of solar insolation followed by twelve hours without insolation. This pattern of solar insolation should be repeated until the temperature reaches steady-state. In the actual experimental tests conducted for the SARP, containers were placed in a high temperature environment for thirty minutes, but then were removed and allowed to cool at an ambient temperature of approximately 40 ◦ F and without solar insolation. Additionally, the experiments were conducted on shipping containers without an internal heat source. In actual conditions, a heat generation source of up to 6.5 Watts would be present within the container. In order to simulate the thermal effects of a heat source, the empty shipping containers were heated to an elevated temperature of 160 ◦ F before the thermal tests were conducted. The goal of this project is to show compliance of the H1616 shipping container with Federal regulations by simulating the container’s thermal response under the specified conditions. A one-dimensional finite difference model of the shipping container is developed in cylindrical coordinates. The model assumes the container is axisymmetric and allows for variable thermal properties in the radial direction. The model is first calibrated using the data obtained from thermal experiments and then used to demonstrate that the thermal performance of the shipping container meets or exceeds the requirements. The maximum temperature reached by the O-ring located near the flange of the containment vessel is used as the key measure of the systems thermal response. The following analysis evaluates whether pre-heating shipping containers before the thermal experiments suitably takes into account the lack of the heat generation source on the maximum temperature reached by this O-ring. The analysis also evaluates the difference in the maximum temperature reached at the O-ring between the conditions as tested (cooling at 40 ◦ F with no solar insolation) and those specified by the Federal requirements (cooling at 100 ◦ F with solar insolation). This report is divided into sections. Section 2 describes the geometry of the shipping 7
Page 1 and 2: SAND REPORT SAND2002-8511 Unlimited
Page 3 and 4: SAND2002-8511 Unlimited Release Pri
Page 5: Contents 1 Introduction . . . . . .
Page 9 and 10: 2 Model Development and Validation
Page 11 and 12: Table 4. Thermal Properties of the
Page 13 and 14: 3 Model Calibration In order to ens
Page 15 and 16: Temperature (F) 1600 1400 1200 1000
Page 17 and 18: shown in Figure 5 using the paramet
Page 19 and 20: Table 7. Final Model Parameters det
Page 21 and 22: 4 Analysis and Results Once the mod
Page 23 and 24: Temperature (F) 180 170 160 150 140
Page 25 and 26: Temperature (F) 60 50 40 30 20 10 0
Page 27 and 28: Temperature (F) 180 170 160 150 140
Page 39 and 40: Table 9. Description and Results of
Page 41 and 42: Temperature (F) 60 40 20 0 -20 -40
Page 43 and 44: attributed to the fact that solar i
Page 45 and 46: References [1] General Plastics Mfg
Page 47 and 48: 1 MS 9401 J.M. Hruby, 8702 1 MS 904

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